9091919109091 has 16 divisors (see below), whose sum is σ = 11848292777664. Its totient is φ = 6770453013504.

The previous prime is 9091919109029. The next prime is 9091919109109. The reversal of 9091919109091 is 1909019191909.

It is a happy number.

9091919109091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9091919109091 - 2²¹ = 9091917011939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9091919139091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2938563130 + ... + 2938566223.

It is an arithmetic number, because the mean of its divisors is an integer number (740518298604).

Almost surely, 2^{9091919109091} is an apocalyptic number.

9091919109091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9091919109091 is a deficient number, since it is larger than the sum of its proper divisors (2756373668573).

9091919109091 is a wasteful number, since it uses less digits than its factorization.

9091919109091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5877129390.

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 9091919109091 in words is "nine trillion, ninety-one billion, nine hundred nineteen million, one hundred nine thousand, ninety-one".